COMMUNITY FORUM

gunk in water heater

there is a sludge like substance in the water heater of the used trailor I just purchased. I would like to add bleach to sanitize it. It is about 6 gal., propane. How much bleach should I add, & how long should I leave it in there before flushing? Also the holding tank needs to be sanitized. It is 40 gal. How much, & how long should I do the tank?